CSPIKE10 is a modification for Quake made by Charlie Zimmerman. This changes the properties of Nails, fired from the Nailgun/Super Nailgun or from a Nail Trap, to be visible after they hit a wall. Some won't properly stick to the wall and instead will bounce, possibly injuring nearby entities. After a short period of time, the Nails shall disappear.
Furthermore, this modification also makes it so that Grenade Launcher grenades will also release some Nails upon exploding.